UK car output fell more than 4% to 153,224 vehicles in September.
Production also fell in April, May, June, and August.
Domestic demand dropped 14.2% to 31,421 units in September, contributing to an overall year-to-date production decrease of 2.2%.
But a Department for Business, Energy and Industrial Strategy spokesperson said: "We have seen significant recent investment in the UK from companies in the sector."
The government has already put £260m into "advanced propulsion" research, and has invested £246m over four years in battery technology, the spokesperson said.
"This will ensure the UK builds on its strengths and leads the world in the design, development and manufacture of electric batteries to secure the future of our automotive sector in the low carbon economy," the spokesperson added.
In September general UK manufacturing growth accelerated, a closely watched survey indicated.
Arndt Ellinghorst, head of global automotive research at Evercore ISI, said consumer confidence had been on the decline.
But he said UK car production had been at a "very high level" earlier in the year, and was "due to correct anyhow".
He added that about 70% of UK car production was for export, so the "overall numbers are still ok", and that manufacturers such as BMW were doing well.
by:http://www.bbc.com/news/business-41751379
Contact: Shugui Yu
Phone: +86 15873820501
Tel: 0755-28868181
Email: service@aqv.hk / support@aqv.hk
Add: Floor 5, Building A, Haoshenglong Fashion Loft, No. 15 Langqin Road, Dalang Street Longhua New District, Shenzhen City, Guangdong Province, CN